π§ Quick Study Guide: Attention Models
- π‘ Broadbent's Filter Model (1958):
- β³ Proposed an 'early selection' mechanism.
- π Sensory information enters a parallel sensory buffer.
- βοΈ A 'filter' selects one message based on physical properties (e.g., pitch, location).
- π« Unattended information is completely blocked and doesn't reach higher-level processing.
- π§ Often described as a 'bottleneck' where only one channel can pass.
- π Treisman's Attenuation Model (1964):
- π A modification of Broadbent's, proposing a 'leaky filter' or 'attenuator'.
- π Unattended messages are not completely blocked but merely 'attenuated' (reduced in strength).
- π£οΈ Both attended and attenuated messages proceed to a 'dictionary unit'.
- π The 'dictionary unit' contains words with varying thresholds for activation; important words (like your name) have lower thresholds.
- π Explains phenomena like the 'cocktail party effect' where relevant unattended information can still be processed.
π Practice Quiz: Test Your Knowledge!
- π€ Broadbent's Filter Model is primarily known as an example of which type of attention theory?
A) Late selection theory
B) Attenuation theory
C) Early selection theory
D) Capacity theory
- π According to Broadbent's Filter Model, what happens to unattended sensory information after it passes through the sensory buffer?
A) It is attenuated but still processed for meaning.
B) It is completely blocked by the filter.
C) It is stored indefinitely in short-term memory.
D) It is processed for meaning before being filtered.
- π The "cocktail party effect," where you can hear your name even in a noisy environment, poses a significant challenge to which model of attention?
A) Treisman's Attenuation Model
B) Deutsch & Deutsch Late Selection Model
C) Broadbent's Filter Model
D) Kahneman's Capacity Model
- π§ Which concept is central to Treisman's Attenuation Model but absent in Broadbent's original model?
A) A sensory buffer for all incoming information.
B) Selection based on physical characteristics.
C) A dictionary unit with varying thresholds.
D) Complete blocking of unattended stimuli.
- βοΈ In Treisman's Attenuation Model, how does the 'attenuator' differ from Broadbent's 'filter'?
A) The attenuator processes information for meaning, while the filter does not.
B) The attenuator completely blocks irrelevant information, while the filter only reduces its strength.
C) The attenuator reduces the strength of irrelevant information, while the filter completely blocks it.
D) The attenuator operates after the meaning has been extracted, while the filter operates before.
- π― If a message has a low threshold in Treisman's 'dictionary unit', what does this imply?
A) It requires more cognitive effort to process.
B) It is less likely to be noticed when attenuated.
C) It is more easily activated and recognized, even with reduced signal strength.
D) It is always blocked by the attenuator.
- π¬ Both Broadbent's and Treisman's models are considered examples of what type of attention theories, focusing on how sensory input is handled?
A) Resource allocation theories
B) Bottleneck theories
C) Feature integration theories
D) Working memory theories
Click to see Answers
1. C
2. B
3. C
4. C
5. C
6. C
7. B